Thank, but no thanks, for perpetuating this popular misconception, utterly unsupported by facts:
“Back then you could just walk into an airport and get on a plane. Private citizens who wanted to kill as many random people as possible didn’t have assault rifles with fifty-shot magazines. The phone system, banks, and power grids weren’t threatened with malicious attacks. We didn’t have vicious killers running around trying blow up airports full of people.”
See, for example, the statistics here about the precipitous DECLINE in frequency of terror attacks in the US since 1970:
Similar statistics can be found about murder and nearly any other type of crime.